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CVE-2026-28223

Cross-Site Scripting (XSS) in wagtail (CVE-2026-28223)

Summary

Cross-site scripting in wagtail (CVE-2026-28223). Confidential information can be exposed externally. Exploitable via wagtail.contrib.simple_translation. Mitigation: upgrade to 7.3.1 or later.

Original description

The description as published by the source.

Impact

A stored Cross-site Scripting (XSS) vulnerability exists on confirmation messages within the wagtail.contrib.simple_translation module. A user with access to the Wagtail admin area may create a page with a specially-crafted title which, when another user performs the "Translate" action, causes arbitrary JavaScript code to run. This could lead to performing actions with that user's credentials. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin.

Patches

Patched versions have been released as Wagtail 6.3.8, 7.0.6, 7.2.3 and 7.3.1.

Workarounds

None

Acknowledgements

Many thanks to Guan Chenxian (@GCXWLP) for reporting this issue.

For more information

If there are any questions or comments about this advisory:

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-28223 has been found in wagtail.
Attackers can target a specific entry point like wagtail.contrib.simple_translation over the network to misuse the product.
Confidential information can be exposed externally.
What to do: upgrade wagtail to 7.3.1 or later.
If unsure, ask your IT team or search "wagtail CVE-2026-28223" on the vendor's site.

CVE-2026-28223 (wagtail) — CWE-79
Attack vector: remote (network-reachable)
Attack surface: wagtail.contrib.simple_translation
Patched: 7.3.1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

Cross-site scripting (XSS) (CWE-79) exists in wagtail. Attackers reach the vulnerable code path via wagtail.contrib.simple_translation.

📍 Affected scope

Check the vendor advisory for the affected versions of wagtail. Attack surface: wagtail.contrib.simple_translation.

🔥 Severity

Severity: ?. Confidential information can be exposed externally.

🔧 How to fix

Update to 7.3.1.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'wagtail' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r 'wagtail' . | grep -v node_modules

    リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で wagtail を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Apply patch patch 
    Upgrade wagtail to 7.3.1

    ステージング環境で 7.3.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。

  3. 3
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

PyPI wagtail
[{"type":"ECOSYSTEM","events":[{"introduced":"7.3rc1"},{"fixed":"7.3.1"}]}]

References

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